18) Kensington Palace Gardens, London, UK – $90 Million
Owner: Lakshmi Mittal – Net Worth: $16.6 Billion
Owned by steel tycoon Lakshmi Mittal, this mansion is located on Billionaires Row in Kensington Palace Gardens, London and has a pool and 12 bedrooms. Mittal purchased this 55,000 sq ft property from Bernie Ecclestone for £57 million in 2004 ($90 million). The steel magnate owns three homes on the high-security street known as Billionaires Row.
17) Promised Land, Montecito, California – $90.3 Million
Owner: Oprah Winfrey – Net Worth: $3 Billion
Owned by media mogul, Oprah Winfrey, this residential property is a Georgian-style manse sits on 40 acres. Its current market value is $90.3 million, according to the 2014 tax assessment.